Hello all,
I am having issues with my 95 Sl2 regaurding poor idle and rpm increases between shifts.
I am running reground twin intake cams, exhaust side rotated 180* and retarded 2 teeth. Prior to the regrinds I had stock twin intake cams (as well as a few other external bolt ons), and it ran well. After installing the regrinds, I have had an issue with horrible idle unless I lean out my SAFC to the maximum at the 800rpm setting. My wideband still is reading rich, which I assume is the PCM compensating for the false lean given by the overlap from the regrinds. What it will do is it will dip to about 500 rpm, stutter for 2-5 seconds, then go back to normal idle. Sometimes it catches itself, other times it stalls. If I have it leaned out all the way at the 800rpm setting, it will always catch itself but then it has a horribly lean tip in when accelerating from 800-2400, where the second setting is. I have that set richer than normal to help with the lean tip in. But that seems to be causing a jump in rpm's while shifting.
I am not too sure what to do, the only thing I can think of is I have too much overlap and the PCM is not thrilled about it?
Anybody have suggestions to try to either increase my idle speed or to help it catch itself when the rpm's drop? Or is it time for megasquirt?
Thanks,
Chris
I am having issues with my 95 Sl2 regaurding poor idle and rpm increases between shifts.
I am running reground twin intake cams, exhaust side rotated 180* and retarded 2 teeth. Prior to the regrinds I had stock twin intake cams (as well as a few other external bolt ons), and it ran well. After installing the regrinds, I have had an issue with horrible idle unless I lean out my SAFC to the maximum at the 800rpm setting. My wideband still is reading rich, which I assume is the PCM compensating for the false lean given by the overlap from the regrinds. What it will do is it will dip to about 500 rpm, stutter for 2-5 seconds, then go back to normal idle. Sometimes it catches itself, other times it stalls. If I have it leaned out all the way at the 800rpm setting, it will always catch itself but then it has a horribly lean tip in when accelerating from 800-2400, where the second setting is. I have that set richer than normal to help with the lean tip in. But that seems to be causing a jump in rpm's while shifting.
I am not too sure what to do, the only thing I can think of is I have too much overlap and the PCM is not thrilled about it?
Anybody have suggestions to try to either increase my idle speed or to help it catch itself when the rpm's drop? Or is it time for megasquirt?
Thanks,
Chris
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